During the brake test, your driver fails to lock the wheels, but the vehicle comes to a complete stop. After analyzing the results you have the following data: Vehicle speed before braking point: 54 km/h Distance between braking point and complete stop: 15 m, Time between braking point and complete stop: 2s Resultant force during braking: 1350 N What is the mass of your vehicle?

1. 160 kg 
2. 180 kg Correct
3. 200 kg
4. 220 kg